many serial numbers of old film cameras reveal their manufacture information
the link below automatically calculates the info for you once you enter the serial (unlike the canon data codes where you have to look up by yourself)
SX-70 Serial Number Calculator
and my results are:
The complete serial number you entered is c404246516.
Your camera has the original SX-70 shutter electronic design ("hybrid shutter").
Your camera is probably an original SX-70 or Alpha / Alpha 1.
The serial number itself is: 42465
Your camera was made on March 6, 1974 during the A shift.
So my SX-70 is about 37 years old
And if you want to find out about your canon
Canon Date Codes